Light emitting device with optimized light-guiding units

1. A light emitting device, comprising: a light emitting panel comprising a pixel, the pixel comprising a first sub-pixel and a second sub-pixel, wherein in a top view of the light emitting device, an area of the first sub-pixel is greater than an area of the second sub-pixel; a light guiding structure disposed on the light emitting panel and comprising: a first amount of light guiding units overlapping with the first sub-pixel; and a second amount of light guiding units overlapping with the second sub-pixel, wherein the first amount is greater than the second amount; and a filter structure disposed on the light guiding structure and comprising: a first filter unit overlapping with the first sub-pixel; and a second filter unit overlapping with the second sub-pixel.

2. The light emitting device as claimed in claim 1, wherein in the top view of the light emitting device, an area of the first filter unit is greater than an area of the second filter unit.

3. The light emitting device as claimed in claim 1, wherein a color of the first filter unit is green.

4. The light emitting device as claimed in claim 1, wherein a color of the second filter unit is blue.

5. A light emitting device, comprising: a light emitting panel comprising a pixel, the pixel comprising a first sub-pixel and a second sub-pixel, wherein in a top view of the light emitting device, an area of the first sub-pixel is greater than an area of the second sub-pixel; and a light guiding structure disposed on the light emitting panel and comprising: a first amount of light guiding units overlapping with the first sub-pixel; and a second amount of light guiding units overlapping with the second sub-pixel, wherein the first amount is greater than the second amount; wherein the first amount satisfies the following equation: 25540(X*Y){circumflex over ( )}−1+173600000(X*Y){circumflex over ( )}−2−0.000749(X*Y){circumflex over ( )}−3+0.0791(X*Y){circumflex over ( )}−4−2.548(X*Y){circumflex over ( )}−5−0.1085≤N≤44027(X*Y){circumflex over ( )}−1+430300000(X*Y){circumflex over ( )}−2−0.005148(X*Y){circumflex over ( )}−3+0.5005(X*Y){circumflex over ( )}−4−15.6(X*Y){circumflex over ( )}−5−0.00081967; wherein X is a resolution of the light emitting panel in PPI, Y is a size of one of the plurality of light guiding units in micrometer, and N is the first amount.